3.7.0.1 html 223 395 1 false 67 0 false 8 false false R1.htm 100000 - Document - Document and Entity Information Sheet http://www.blackline.com/20161231/taxonomy/role/DocumentDocumentAndEntityInformation Document and Entity Information Cover 1 false false R2.htm 100010 - Statement - CONSOLIDATED BALANCE SHEETS Sheet http://www.blackline.com/20161231/taxonomy/role/StatementCONSOLIDATEDBALANCESHEETS CONSOLIDATED BALANCE SHEETS Statements 2 false false R3.htm 100020 - Statement - CONSOLIDATED BALANCE SHEETS (PARENTHETICAL) Sheet http://www.blackline.com/20161231/taxonomy/role/StatementCONSOLIDATEDBALANCESHEETSPARENTHETICAL CONSOLIDATED BALANCE SHEETS (PARENTHETICAL) Statements 3 false false R4.htm 100030 - Statement - CONSOLIDATED STATEMENTS OF OPERATIONS Sheet http://www.blackline.com/20161231/taxonomy/role/StatementCONSOLIDATEDSTATEMENTSOFOPERATIONS CONSOLIDATED STATEMENTS OF OPERATIONS Statements 4 false false R5.htm 100040 - Statement - CONSOLIDATED STATEMENTS OF COMPREHENSIVE LOSS Sheet http://www.blackline.com/20161231/taxonomy/role/StatementCONSOLIDATEDSTATEMENTSOFCOMPREHENSIVELOSS CONSOLIDATED STATEMENTS OF COMPREHENSIVE LOSS Statements 5 false false R6.htm 100050 - Statement - CONSOLIDATED STATEMENTS OF COMPREHENSIVE LOSS (PARENTHETICAL) Sheet http://www.blackline.com/20161231/taxonomy/role/StatementCONSOLIDATEDSTATEMENTSOFCOMPREHENSIVELOSSPARENTHETICAL CONSOLIDATED STATEMENTS OF COMPREHENSIVE LOSS (PARENTHETICAL) Statements 6 false false R7.htm 100060 - Statement - CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY Sheet http://www.blackline.com/20161231/taxonomy/role/StatementCONSOLIDATEDSTATEMENTSOFSTOCKHOLDERSEQUITY CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY Statements 7 false false R8.htm 100070 - Statement - CONSOLIDATED STATEMENTS OF CASH FLOWS Sheet http://www.blackline.com/20161231/taxonomy/role/StatementCONSOLIDATEDSTATEMENTSOFCASHFLOWS CONSOLIDATED STATEMENTS OF CASH FLOWS Statements 8 false false R9.htm 100080 - Disclosure - The Company Sheet http://www.blackline.com/20161231/taxonomy/role/DisclosureTheCompany The Company Notes 9 false false R10.htm 100090 - Disclosure - Significant Accounting Policies Sheet http://www.blackline.com/20161231/taxonomy/role/DisclosureSignificantAccountingPolicies Significant Accounting Policies Notes 10 false false R11.htm 100100 - Disclosure - Property and Equipment Sheet http://www.blackline.com/20161231/taxonomy/role/DisclosurePropertyAndEquipment Property and Equipment Notes 11 false false R12.htm 100110 - Disclosure - Business Combination Sheet http://www.blackline.com/20161231/taxonomy/role/DisclosureBusinessCombination Business Combination Notes 12 false false R13.htm 100120 - Disclosure - Intangible Assets and Goodwill Sheet http://www.blackline.com/20161231/taxonomy/role/DisclosureIntangibleAssetsAndGoodwill Intangible Assets and Goodwill Notes 13 false false R14.htm 100130 - Disclosure - Accrued Expenses and Other Current Liabilities Sheet http://www.blackline.com/20161231/taxonomy/role/DisclosureAccruedExpensesAndOtherCurrentLiabilities Accrued Expenses and Other Current Liabilities Notes 14 false false R15.htm 100140 - Disclosure - Term Loan Sheet http://www.blackline.com/20161231/taxonomy/role/DisclosureTermLoan Term Loan Notes 15 false false R16.htm 100150 - Disclosure - Income Taxes Sheet http://www.blackline.com/20161231/taxonomy/role/DisclosureIncomeTaxes Income Taxes Notes 16 false false R17.htm 100160 - Disclosure - Contingent Consideration Sheet http://www.blackline.com/20161231/taxonomy/role/DisclosureContingentConsideration Contingent Consideration Notes 17 false false R18.htm 100170 - Disclosure - Commitment and Contingencies Sheet http://www.blackline.com/20161231/taxonomy/role/DisclosureCommitmentAndContingencies Commitment and Contingencies Notes 18 false false R19.htm 100180 - Disclosure - Capitalization Sheet http://www.blackline.com/20161231/taxonomy/role/DisclosureCapitalization Capitalization Notes 19 false false R20.htm 100190 - Disclosure - Stock Options Sheet http://www.blackline.com/20161231/taxonomy/role/DisclosureStockOptions Stock Options Notes 20 false false R21.htm 100200 - Disclosure - Defined Contribution Plan Sheet http://www.blackline.com/20161231/taxonomy/role/DisclosureDefinedContributionPlan Defined Contribution Plan Notes 21 false false R22.htm 100210 - Disclosure - Related Party Transactions Sheet http://www.blackline.com/20161231/taxonomy/role/DisclosureRelatedPartyTransactions Related Party Transactions Notes 22 false false R23.htm 100220 - Disclosure - Geographic Information Sheet http://www.blackline.com/20161231/taxonomy/role/DisclosureGeographicInformation Geographic Information Notes 23 false false R24.htm 100230 - Disclosure - Unaudited Quarterly Data Sheet http://www.blackline.com/20161231/taxonomy/role/DisclosureUnauditedQuarterlyData Unaudited Quarterly Data Notes 24 false false R25.htm 100240 - Disclosure - Significant Accounting Policies (Policies) Sheet http://www.blackline.com/20161231/taxonomy/role/DisclosureSignificantAccountingPoliciesPolicies Significant Accounting Policies (Policies) Policies http://www.blackline.com/20161231/taxonomy/role/DisclosureSignificantAccountingPolicies 25 false false R26.htm 100250 - Disclosure - Significant Accounting Policies (Tables) Sheet http://www.blackline.com/20161231/taxonomy/role/DisclosureSignificantAccountingPoliciesTables Significant Accounting Policies (Tables) Tables http://www.blackline.com/20161231/taxonomy/role/DisclosureSignificantAccountingPolicies 26 false false R27.htm 100260 - Disclosure - Property and Equipment (Tables) Sheet http://www.blackline.com/20161231/taxonomy/role/DisclosurePropertyAndEquipmentTables Property and Equipment (Tables) Tables http://www.blackline.com/20161231/taxonomy/role/DisclosurePropertyAndEquipment 27 false false R28.htm 100270 - Disclosure - Business Combination (Tables) Sheet http://www.blackline.com/20161231/taxonomy/role/DisclosureBusinessCombinationTables Business Combination (Tables) Tables http://www.blackline.com/20161231/taxonomy/role/DisclosureBusinessCombination 28 false false R29.htm 100280 - Disclosure - Intangible Assets and Goodwill (Tables) Sheet http://www.blackline.com/20161231/taxonomy/role/DisclosureIntangibleAssetsAndGoodwillTables Intangible Assets and Goodwill (Tables) Tables http://www.blackline.com/20161231/taxonomy/role/DisclosureIntangibleAssetsAndGoodwill 29 false false R30.htm 100290 - Disclosure - Accrued Expenses and Other Current Liabilities (Tables) Sheet http://www.blackline.com/20161231/taxonomy/role/DisclosureAccruedExpensesAndOtherCurrentLiabilitiesTables Accrued Expenses and Other Current Liabilities (Tables) Tables http://www.blackline.com/20161231/taxonomy/role/DisclosureAccruedExpensesAndOtherCurrentLiabilities 30 false false R31.htm 100300 - Disclosure - Income Taxes (Tables) Sheet http://www.blackline.com/20161231/taxonomy/role/DisclosureIncomeTaxesTables Income Taxes (Tables) Tables http://www.blackline.com/20161231/taxonomy/role/DisclosureIncomeTaxes 31 false false R32.htm 100310 - Disclosure - Commitments and Contingencies (Tables) Sheet http://www.blackline.com/20161231/taxonomy/role/DisclosureCommitmentsAndContingenciesTables Commitments and Contingencies (Tables) Tables 32 false false R33.htm 100320 - Disclosure - Stock Options (Tables) Sheet http://www.blackline.com/20161231/taxonomy/role/DisclosureStockOptionsTables Stock Options (Tables) Tables http://www.blackline.com/20161231/taxonomy/role/DisclosureStockOptions 33 false false R34.htm 100330 - Disclosure - Geographic Information (Tables) Sheet http://www.blackline.com/20161231/taxonomy/role/DisclosureGeographicInformationTables Geographic Information (Tables) Tables http://www.blackline.com/20161231/taxonomy/role/DisclosureGeographicInformation 34 false false R35.htm 100340 - Disclosure - Unaudited Quarterly Data (Tables) Sheet http://www.blackline.com/20161231/taxonomy/role/DisclosureUnauditedQuarterlyDataTables Unaudited Quarterly Data (Tables) Tables http://www.blackline.com/20161231/taxonomy/role/DisclosureUnauditedQuarterlyData 35 false false R36.htm 100350 - Disclosure - Significant Accounting Policies - Additional Information (Details) Sheet http://www.blackline.com/20161231/taxonomy/role/DisclosureSignificantAccountingPoliciesAdditionalInformationDetails Significant Accounting Policies - Additional Information (Details) Details 36 false false R37.htm 100360 - Disclosure - Significant Accounting Policies - Schedule of Investments in Marketable Securities (Details) Sheet http://www.blackline.com/20161231/taxonomy/role/DisclosureSignificantAccountingPoliciesScheduleOfInvestmentsInMarketableSecuritiesDetails Significant Accounting Policies - Schedule of Investments in Marketable Securities (Details) Details 37 false false R38.htm 100370 - Disclosure - Significant Accounting Policies - Summary of Amortized Cost and Fair Values of Marketable Securities, by Remaining Contractual Maturity (Details) Sheet http://www.blackline.com/20161231/taxonomy/role/DisclosureSignificantAccountingPoliciesSummaryOfAmortizedCostAndFairValuesOfMarketableSecuritiesByRemainingContractualMaturityDetails Significant Accounting Policies - Summary of Amortized Cost and Fair Values of Marketable Securities, by Remaining Contractual Maturity (Details) Details 38 false false R39.htm 100380 - Disclosure - Significant Accounting Policies - Schedule of Estimated Useful Lives of Property and Equipment (Details) Sheet http://www.blackline.com/20161231/taxonomy/role/DisclosureSignificantAccountingPoliciesScheduleOfEstimatedUsefulLivesOfPropertyAndEquipmentDetails Significant Accounting Policies - Schedule of Estimated Useful Lives of Property and Equipment (Details) Details 39 false false R40.htm 100390 - Disclosure - Significant Accounting Policies - Schedule of Estimated Useful Lives of Finite-Lived Intangible Assets (Details) Sheet http://www.blackline.com/20161231/taxonomy/role/DisclosureSignificantAccountingPoliciesScheduleOfEstimatedUsefulLivesOfFiniteLivedIntangibleAssetsDetails Significant Accounting Policies - Schedule of Estimated Useful Lives of Finite-Lived Intangible Assets (Details) Details 40 false false R41.htm 100400 - Disclosure - Significant Accounting Policies - Summary of Financial Assets and Liabilities Measured at Fair Value on Recurring Basis (Details) Sheet http://www.blackline.com/20161231/taxonomy/role/DisclosureSignificantAccountingPoliciesSummaryOfFinancialAssetsAndLiabilitiesMeasuredAtFairValueOnRecurringBasisDetails Significant Accounting Policies - Summary of Financial Assets and Liabilities Measured at Fair Value on Recurring Basis (Details) Details 41 false false R42.htm 100410 - Disclosure - Significant Accounting Policies - Summary of Changes in Common Stock Warrant Liability and Contingent Consideration Liability (Details) Sheet http://www.blackline.com/20161231/taxonomy/role/DisclosureSignificantAccountingPoliciesSummaryOfChangesInCommonStockWarrantLiabilityAndContingentConsiderationLiabilityDetails Significant Accounting Policies - Summary of Changes in Common Stock Warrant Liability and Contingent Consideration Liability (Details) Details 42 false false R43.htm 100420 - Disclosure - Significant Accounting Policies - Schedule of Weighted Average Assumptions (Details) Sheet http://www.blackline.com/20161231/taxonomy/role/DisclosureSignificantAccountingPoliciesScheduleOfWeightedAverageAssumptionsDetails Significant Accounting Policies - Schedule of Weighted Average Assumptions (Details) Details 43 false false R44.htm 100430 - Disclosure - Significant Accounting Policies - Schedule of Potentially Dilutive Shares Excluded From Calculation of Diluted Net Loss Per Share Attributable to Common Stockholders (Details) Sheet http://www.blackline.com/20161231/taxonomy/role/DisclosureSignificantAccountingPoliciesScheduleOfPotentiallyDilutiveSharesExcludedFromCalculationOfDilutedNetLossPerShareAttributableToCommonStockholdersDetails Significant Accounting Policies - Schedule of Potentially Dilutive Shares Excluded From Calculation of Diluted Net Loss Per Share Attributable to Common Stockholders (Details) Details 44 false false R45.htm 100440 - Disclosure - Property and Equipment - Schedule of Property and Equipment (Details) Sheet http://www.blackline.com/20161231/taxonomy/role/DisclosurePropertyAndEquipmentScheduleOfPropertyAndEquipmentDetails Property and Equipment - Schedule of Property and Equipment (Details) Details 45 false false R46.htm 100450 - Disclosure - Property and Equipment - Additional Information (Details) Sheet http://www.blackline.com/20161231/taxonomy/role/DisclosurePropertyAndEquipmentAdditionalInformationDetails Property and Equipment - Additional Information (Details) Details 46 false false R47.htm 100460 - Disclosure - Business Combinations - Additional Information (Details) Sheet http://www.blackline.com/20161231/taxonomy/role/DisclosureBusinessCombinationsAdditionalInformationDetails Business Combinations - Additional Information (Details) Details 47 false false R48.htm 100470 - Disclosure - Business Combination - Summary of Estimated Fair Values of Assets Acquired and Liabilities Assumed (Details) Sheet http://www.blackline.com/20161231/taxonomy/role/DisclosureBusinessCombinationSummaryOfEstimatedFairValuesOfAssetsAcquiredAndLiabilitiesAssumedDetails Business Combination - Summary of Estimated Fair Values of Assets Acquired and Liabilities Assumed (Details) Details 48 false false R49.htm 100480 - Disclosure - Business Combinations - Schedule of Acquired Intangible Asset Categories, Fair Value and Amortization Periods (Details) Sheet http://www.blackline.com/20161231/taxonomy/role/DisclosureBusinessCombinationsScheduleOfAcquiredIntangibleAssetCategoriesFairValueAndAmortizationPeriodsDetails Business Combinations - Schedule of Acquired Intangible Asset Categories, Fair Value and Amortization Periods (Details) Details 49 false false R50.htm 100490 - Disclosure - Business Combination - Schedule of Unaudited Pro Forma Information (Details) Sheet http://www.blackline.com/20161231/taxonomy/role/DisclosureBusinessCombinationScheduleOfUnauditedProFormaInformationDetails Business Combination - Schedule of Unaudited Pro Forma Information (Details) Details 50 false false R51.htm 100500 - Disclosure - Intangible Assets and Goodwill - Summary of Carrying Value of Intangible Assets (Details) Sheet http://www.blackline.com/20161231/taxonomy/role/DisclosureIntangibleAssetsAndGoodwillSummaryOfCarryingValueOfIntangibleAssetsDetails Intangible Assets and Goodwill - Summary of Carrying Value of Intangible Assets (Details) Details 51 false false R52.htm 100510 - Disclosure - Intangible Assets and Goodwill - Amortization Expense by Operation Expense Categories (Details) Sheet http://www.blackline.com/20161231/taxonomy/role/DisclosureIntangibleAssetsAndGoodwillAmortizationExpenseByOperationExpenseCategoriesDetails Intangible Assets and Goodwill - Amortization Expense by Operation Expense Categories (Details) Details 52 false false R53.htm 100520 - Disclosure - Intangible Assets and Goodwill - Summary of Estimated Amortization Expense (Details) Sheet http://www.blackline.com/20161231/taxonomy/role/DisclosureIntangibleAssetsAndGoodwillSummaryOfEstimatedAmortizationExpenseDetails Intangible Assets and Goodwill - Summary of Estimated Amortization Expense (Details) Details 53 false false R54.htm 100530 - Disclosure - Intangible Assets and Goodwill - Summary of Change in Carrying Amount of Goodwill (Details) Sheet http://www.blackline.com/20161231/taxonomy/role/DisclosureIntangibleAssetsAndGoodwillSummaryOfChangeInCarryingAmountOfGoodwillDetails Intangible Assets and Goodwill - Summary of Change in Carrying Amount of Goodwill (Details) Details 54 false false R55.htm 100540 - Disclosure - Accrued Expenses and Other Current Liabilities - Schedule of Accrued Expenses and Other Current Liabilities (Details) Sheet http://www.blackline.com/20161231/taxonomy/role/DisclosureAccruedExpensesAndOtherCurrentLiabilitiesScheduleOfAccruedExpensesAndOtherCurrentLiabilitiesDetails Accrued Expenses and Other Current Liabilities - Schedule of Accrued Expenses and Other Current Liabilities (Details) Details 55 false false R56.htm 100550 - Disclosure - Term Loan - Additional Information (Details) Sheet http://www.blackline.com/20161231/taxonomy/role/DisclosureTermLoanAdditionalInformationDetails Term Loan - Additional Information (Details) Details 56 false false R57.htm 100560 - Disclosure - Income Taxes - Components of Income (Loss) Before Income Taxes (Details) Sheet http://www.blackline.com/20161231/taxonomy/role/DisclosureIncomeTaxesComponentsOfIncomeLossBeforeIncomeTaxesDetails Income Taxes - Components of Income (Loss) Before Income Taxes (Details) Details 57 false false R58.htm 100570 - Disclosure - Income Taxes - Components of Total Benefit from Income Taxes (Details) Sheet http://www.blackline.com/20161231/taxonomy/role/DisclosureIncomeTaxesComponentsOfTotalBenefitFromIncomeTaxesDetails Income Taxes - Components of Total Benefit from Income Taxes (Details) Details 58 false false R59.htm 100580 - Disclosure - Income Taxes - Reconciliation of Statutory U.S. Federal Tax Rate to Effective Tax Rate (Details) Sheet http://www.blackline.com/20161231/taxonomy/role/DisclosureIncomeTaxesReconciliationOfStatutoryUSFederalTaxRateToEffectiveTaxRateDetails Income Taxes - Reconciliation of Statutory U.S. Federal Tax Rate to Effective Tax Rate (Details) Details 59 false false R60.htm 100590 - Disclosure - Income Taxes - Significant Components of Deferred Tax Assets and Liabilities (Details) Sheet http://www.blackline.com/20161231/taxonomy/role/DisclosureIncomeTaxesSignificantComponentsOfDeferredTaxAssetsAndLiabilitiesDetails Income Taxes - Significant Components of Deferred Tax Assets and Liabilities (Details) Details 60 false false R61.htm 100600 - Disclosure - Income Taxes - Additional Information (Details) Sheet http://www.blackline.com/20161231/taxonomy/role/DisclosureIncomeTaxesAdditionalInformationDetails Income Taxes - Additional Information (Details) Details 61 false false R62.htm 100610 - Disclosure - Income taxes - Summary of Change in Valuation Allowance (Details) Sheet http://www.blackline.com/20161231/taxonomy/role/DisclosureIncomeTaxesSummaryOfChangeInValuationAllowanceDetails Income taxes - Summary of Change in Valuation Allowance (Details) Details 62 false false R63.htm 100620 - Disclosure - Income Taxes - Roll Forward of Total Gross Unrecognized Tax Benefits (Details) Sheet http://www.blackline.com/20161231/taxonomy/role/DisclosureIncomeTaxesRollForwardOfTotalGrossUnrecognizedTaxBenefitsDetails Income Taxes - Roll Forward of Total Gross Unrecognized Tax Benefits (Details) Details 63 false false R64.htm 100630 - Disclosure - Contingent Consideration - Additional Information (Details) Sheet http://www.blackline.com/20161231/taxonomy/role/DisclosureContingentConsiderationAdditionalInformationDetails Contingent Consideration - Additional Information (Details) Details 64 false false R65.htm 100640 - Disclosure - Commitment and Contingencies - Additional Information (Details) Sheet http://www.blackline.com/20161231/taxonomy/role/DisclosureCommitmentAndContingenciesAdditionalInformationDetails Commitment and Contingencies - Additional Information (Details) Details 65 false false R66.htm 100650 - Disclosure - Commitments and Contingencies - Schedule of Future Minimum Lease Payments Under Non-cancelable Operating Leases (Details) Sheet http://www.blackline.com/20161231/taxonomy/role/DisclosureCommitmentsAndContingenciesScheduleOfFutureMinimumLeasePaymentsUnderNonCancelableOperatingLeasesDetails Commitments and Contingencies - Schedule of Future Minimum Lease Payments Under Non-cancelable Operating Leases (Details) Details 66 false false R67.htm 100660 - Disclosure - Capitalization - Additional Information (Details) Sheet http://www.blackline.com/20161231/taxonomy/role/DisclosureCapitalizationAdditionalInformationDetails Capitalization - Additional Information (Details) Details 67 false false R68.htm 100670 - Disclosure - Stock Options - Additional Information (Details) Sheet http://www.blackline.com/20161231/taxonomy/role/DisclosureStockOptionsAdditionalInformationDetails Stock Options - Additional Information (Details) Details 68 false false R69.htm 100680 - Disclosure - Stock Options - Summary of Stock Option Activity (Details) Sheet http://www.blackline.com/20161231/taxonomy/role/DisclosureStockOptionsSummaryOfStockOptionActivityDetails Stock Options - Summary of Stock Option Activity (Details) Details 69 false false R70.htm 100690 - Disclosure - Stock Options - Summary of Stock-Based Compensation Expense (Details) Sheet http://www.blackline.com/20161231/taxonomy/role/DisclosureStockOptionsSummaryOfStockBasedCompensationExpenseDetails Stock Options - Summary of Stock-Based Compensation Expense (Details) Details 70 false false R71.htm 100700 - Disclosure - Defined Contribution Plan - Additional Information (Details) Sheet http://www.blackline.com/20161231/taxonomy/role/DisclosureDefinedContributionPlanAdditionalInformationDetails Defined Contribution Plan - Additional Information (Details) Details 71 false false R72.htm 100710 - Disclosure - Related Party Transactions - Additional Information (Details) Sheet http://www.blackline.com/20161231/taxonomy/role/DisclosureRelatedPartyTransactionsAdditionalInformationDetails Related Party Transactions - Additional Information (Details) Details 72 false false R73.htm 100720 - Disclosure - Geographic Information - Schedule of Revenue by Geographic Region (Details) Sheet http://www.blackline.com/20161231/taxonomy/role/DisclosureGeographicInformationScheduleOfRevenueByGeographicRegionDetails Geographic Information - Schedule of Revenue by Geographic Region (Details) Details 73 false false R74.htm 100730 - Disclosure - Geographic Information - Schedule of Property and Equipment, Net by Geographic Region (Details) Sheet http://www.blackline.com/20161231/taxonomy/role/DisclosureGeographicInformationScheduleOfPropertyAndEquipmentNetByGeographicRegionDetails Geographic Information - Schedule of Property and Equipment, Net by Geographic Region (Details) Details 74 false false R75.htm 100740 - Disclosure - Unaudited Quarterly Data - Summary of Unaudited Quarterly Consolidated Statements of Operations (Details) Sheet http://www.blackline.com/20161231/taxonomy/role/DisclosureUnauditedQuarterlyDataSummaryOfUnauditedQuarterlyConsolidatedStatementsOfOperationsDetails Unaudited Quarterly Data - Summary of Unaudited Quarterly Consolidated Statements of Operations (Details) Details 75 false false All Reports Book All Reports bl-20161231.xml bl-20161231.xsd bl-20161231_cal.xml bl-20161231_def.xml bl-20161231_lab.xml bl-20161231_pre.xml true true